Polar H10 won't connect unless I remove red rubber washer. Is your battery cover flush? Using CR2025. : r/Polarfitness

Polar H10 Heart Rate Monitor, Bluetooth HRM Chest Strap - iPhone & Android Compatible, Black : Sports & Outdoors

Troubleshooting Polar H9 / H10 heart rate sensor

My light stick isn't working : r/kpophelp

12. CUSTOMER SERVICE INFORMATION

Tamagotchi On wont turn on anymore even with new batteries : r/tamagotchi

Tip to resolve Polar H10 connection issues with CR2025 vs CR2032 batteries : r/Polarfitness

my 75t is blinking for 2 days and not charging anything to do : r/Jabra

Polar H10 Heart Rate Monitor: Very Long Term In-Depth Review

Polar H10 Heart Rate Monitor, Bluetooth HRM Chest Strap - iPhone & Android Compatible, Black : Sports & Outdoors

Tamagotchi On wont turn on anymore even with new batteries : r/tamagotchi

Dreame D10 plus sensor error? Ive cleaned off the sensors and nothing is blocking it. What should i do? Ive only had it a few months. : r/Dreame_Tech